'You should believe him': Putin's nuclear threat terrifies Ukrainians

The conflict in Ukraine has escalated again, with Belarus providing extra support for Russia's invasion and Vladimir Putin threatening nuclear war as western countries step up support for Ukraine's military.  Today, former US state department adviser Max Bergmann on what Russia's dangerous nuclear warning means for Ukrainians and the world.  And we speak to international law expert Doctor Lada Roslycky, who's hiding in a safe house in Ukraine, on why citizens are terrified about what could come next.  Featured:  Max Bergmann, Senior Fellow, Center for American Progress, Washington DC Dr Lada Roslycky, Black Trident Defense and Security Consulting Group, Currently sheltering in undisclosed location in Ukraine